Heel-trim ming machine



N0. 609,5l8. Patented Aug. 23, I898. B. F. MAYO.

HEEL TRIMMING MACHINE.

(Application filed Dec. 29, 1896.)

2 Sheets-Sheet I.

(No Model.)

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No. 609,5!8. Patented Aug. 23, I898. B. F. MAYO.

HEEL TRIMMING MACHINE.

(Application filed Dec. 29 1896.)

2 Sheets-Sheet 2.

I V j I FHQI BENJAMIN F. MAYO, OF SALEM, MASSACHUSETTS, ASSIGNOR TO JAMES W. BROOKS, TRUSTEE, or PETERSHAM, MASSACHUSETTS.

HEEL-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 609,518, dated August 23, 1898. Applicatioufiled December 29,1896. Serial No. 617,311. (No model.)

To aZZ whom it may concern.-

Be it known that I, BENJAMIN F. MAYO, of Salem, county of Essex, State of Massachusetts, have invented an Improvement in Heel- Trimming Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention has for its object the production of a novel machine for trimming heels on boots and shoes, my invention being especially adapted to trimming what are known as spring-heels.

In my improved machine the cutter, which has a series of blades shaped to conform to the requirements of the heel, has cooperating withit a rotary rest, against which the edge of the sole lying without the heel to be trimmed bears during the trimming operation, said rest being composed of a rotatable ring or collar having a series of projections which enter the spaces between the blades of the rotary cutter and rotate in unison with the said cutter. The cutter is free to move laterally with relation to this rest and parallel with the axis of the driving-shaft to thus enable the cutter to adapt itself to the different thicknesses of the heel being trimmed.

WVith a spring-heel the thickness of the leather interposed between the outer and the inner sole varies, it decreasing in thickness at the shank, and to trim this material of least thickness and while doing so obviate cutting injuriously into the edge of the outer sole at the Shank I have combined with thesaid cutter and rest two edge-guides, one being located at one and the other at the oppositeside of the cutter, said edge-guides being so located as to temporarily furnish an auxiliary support for the sole outside the heel portion just for the period of time that the cutter is starting to trim the portion of the heel of least thickness, or at what in spring-heels is sometimes called the scarf, the rotation of the heel under the cutter as the latter acts to trim theround part of the heel removing the sole from contact with the said guide, thus letting only the rotary rest act to position the. solo. The rotary rest has an annular or ring-like surface, which bears against the outer face of the sole at its edge and keeps the said edge smooth, and'but for this ring-like surface the edge might be rough, so I have called this surface a .feather-edger. The sole of the spring-heel shoe is placed on a heel-support, the same being a plate adj ustably held alongside of the rotary cutter. The, operator presses'the heel of. the sole against this support and the edge of the sole against the rest,

and as the heel is trimmed he turns the face of the sole about on this support, keeping, however, the edge of the sole against the rotating rest or one or the other of the said guides. Thissupport may be placed or adjusted to occupy a more or less angular position with relation to the vertical plane in which the cutter revolves, so that the edge of the heel may be more or less inclined, as may be desired by the particular manufacturers who are to use the machine. The heel-support may also be adjusted bodily back and forth to thus adapt the machine to trimming heels which are convexed or made thicker in the median line of the sole.

Figure 1 represents a top or plan view of a sufficient portion of a heel-trimming machine containing my improvements to enable my invention to be understood; Fig. 2, a right-hand side elevation of theapparatus shown in Fig. 1 with the heel-support removed. Fig. 3 is a front elevation of the parts shown in Fig. 1. Fig. 4 is an enlarged vertical section in the line :0, Fig. 1. Fig. 5 is an enlarged face View of the rotatingrest and feather-edger. Fig. 6 is a face View of the cutter employed; Fig. '7, an inner end elevation of the head and the bearing for the rotary rest; Fig. 8, a detail of the front end of the box A I have not herein considered it necessary to show any considerable portion of the framework of the machine, as that may be of any usual or suitable construction. I have shown, however, a portion A of the framework, it

receivin a bearing-box A, which is ivota 9 ally mounted therein by or through the pointscrews A the forward or left-hand end of said bearing-box having clamped upon it a slotted hollow box A the said hollow box constituting a bearing for the head A to be described, it also inclosing within it other parts. This hollow box is held in position by means of a clamp-screw A entering ears of the hollow box, the said hollow box being split, as shown in Fig. 1, so that by said screws the said hollow box is clamped firmly upon the bearing-box. The shaft B, having suitable bearings in the usual framework, is also extended through the bearing-box A, and the said shaft, at the rear or right-hand end of the bearing-box, has fast upon it a collar B, which thus positions the shaft longitudinally with relation to the other parts of the machine.

The shaft B is shown as provided with a solid collar B upon which, in this present instance, I have secured by suitable screws, as b, rollers 12, which enter slots 11 in a sleeve B suitably shaped to embrace said collar and also the prolonged left-hand end of the shaft B, the said sleeve being provided at its outer end with a tapped hole to receive a studscrew 0, the said stu d-screw passing centrally through a rand-gage c and through the central opening 0 (see Fig. 6) of the cutter 0 said stud screw thus confining the cutter upon the said sleeve. The sleeve has a shoulder against which the rear edge of thehub of the cutter bears, while the front edge of the hub of the cutter is acted upon by the interior face of the rand-guide. The sleeve constitutes a driver for the cutter,the sleeve being driven by or through the rollers or projections 2), attached to the shaft B. Cooperating with this cutter, the teeth of which .may be of any usual or suitable shape, I employ a rotary rest, it being shown detached in Fig. 5. This rotary rest consists, essentially, of a hollow hub d, (shown in section in Fig. 4,) said hub entering a cylindrical box or bearing 6.

The hollow hub d has, as shown, a laterally-projecting flange cl, and projecting from the endof the hub beyond the said flange are a series of rests d a rest for every space between the teeth of the cutter, said rests entering loosely when in operative position the spaces between the blades of the said cutter, as shown in Fig. 3. These rests d consisting of a series of fingers extended in between the blades of the cutter, the acting edges of said fingers standing substantially parallel to the axis of rotation of the said cutter, are surrounded externally at a short distance back from their ends (see Figs. 4 and 5) with a plain metallic ring (1 said ring being preferably driven snugly onto said rests, so that it practically becomes a part of the rest and rotates with it and the cutter. The outer edge of this ring or feather-edger presents a shoulder which stands a little way back from the ends of the rest and projects from said rests at substantially a right angle, said feather-edger bearing against the outer face of the sole while the heel between the said sole and upper is being trimmed by the blades of the cutter, the edge of said sole being normally kept pressed against the rests as they rotate with the cutter. When the cutter and its rests are so adjusted as to enable the cutter to also somewhat trim away the sole, together with the heel, then this feather-edger, acting on the edge of the sole at the line where it is being trimmed, holds the sole at its face up so firmly to the action of the cutter that the sole has no opportunity whatever to spread out laterally, and consequently the said feather-edger prevents or obviates the leaving on of any thin ragged edge or feather which would otherwise project somewhat outwardly at the outer face of the sole. To drive this rotary rest in unison with the cutter and relieve the cutter from the duty of actuating it, I have provided the shaft with a pin f, which is extended out through a short slot 2 in the sleeve B said pin entering a hole in the hub constituting part of the rest, so that said hub is rotated in the surrounding hearing 9, and to permit the cutter while the edge of the rand-guide rests in the space between the sole and the upper or between the springheel and the upper to adapt itself to the thickness of the heel or that part between the sole and the upper I have provided the slot 2 and the extra slots 5 To insure the holding of the cutter in its normal positionthat is, for the thinnest heel which itis capable of trim ming-I have added to the head a yoke D, upon which is pivoted at D a holder D said holder having in turn pivoted upon it a presser plate or finger D the pivot being represented at D, a suitable spring D (shown in Fig. 1) normally acting to keep the holder or finger pressed against the stud-screw 0; but when the heel being trimmed increases in thickness the cutter, by or through the action of the rand-guide in the crease, may be pulled or drawn out to the left, viewing Fig. 1, and at such time the tension of the spring D has to be overcome.

The finger D when desired, may be keptin elevated position, as shown in Fig. 3,as when, for instance, the cutter is to be removed, the finger being then turned up, a shoulder on the finger meeting the stud g on the holder D.

To adjust the finger to cutters of different thicknesses, I have provided the holder D with a projection g which is acted upon by a screw 9 in the yoke D.

Upon one side of the head A -viz., the right-hand side, as shown in the drawings- I have attached by a suitable screw, as h, a heel-support h, its outer facing occupying a position (see Fig. 1) more or less inclined with relation to the vertical plane in which the cutter rotates, so that by changing the position of said heel-support the edge of the spring-heel may be inclined more or less. I have shown this heel-support as having an arm provided with a curved slot, through which is extended the screw it.

In some cases the heel of the sole covering the spring-heel is convexed, so as to give the heel a greater thickness in the median line of the last, and to adapt this heel-support for such purposes the face of thesupport must be carried bac'kwardly or to the right, view IIO ing Fig. l, and to effect this purpose I may slacken the screw 71 and move longitudinally with relation to the shaft B the small plate 72/3, to which the arm of the heel-support is attached by the screw it.

Upon the face of the head (see Fig. 3) I have placed two auxiliary guides m m,one being at one and the other at the opposite side of the rotary cutter, one or more rests 61 being exposed in the space between the said auxiliary guides, the said auxiliary guides forming a continuation of said rest and in no Way obstructing or covering the edges of the cutters which act upon the sole.

In the manufacture of shoes having spring heels the heel of the outer sole is died out to pattern and the outer sole is not to be trimmed, but the leather constituting the heel is put in between this died-out outer sole and the inner sole and upper, and this heel is to be trimmed in this machine.

A shoe having a heel to be trimmed is taken by the operator, and the face of the outer sole at the heel part is put against the heelsupport 71, (see dotted line 7%) the shoe standin g substantially vertical,viewing Fig. 3,with the toe of the shoe uppermost, the heel part of the outer sole at its junction with the scarf standing against the gage m while the scarf is being trimmed. The scarf having been trimmed, the shoe will be moved vertically,

- and in so doing the outer face of the sole near its edge will come upon the face of the feather-edger and the edge of the sole-comes against the rests 01 one after another, as the cutter and rest rotate, and this operation of trimming the heel is continued until the toe of the shoe is brought to point substantially downward in the dotted-line position n,when the movement of the shoe is again vertical, but with the heel upward, and when the shoe is sufficiently elevated to bring the scarf part of the sole again in position to be trimmed, together with the small beveled end of the heel, the edge of the sole comes this time against the gage m. During this trimming operationthe rests (I work one after another and form a perfect support, against Which the edge of the sole may travel.

, This invention is not limited to the exact construction shown of the several devices, as the construction might be variedby the skill of a mechanic and without invention and yet perform the results hereinbefore referred to.

The head A has at its inner side (see Fig. 7)

a slot or recess 0 out partially through it from front to back, said slot being opened at the front of said head, or that portion of the head where the operator stands, (see Fig. 2,) to receive and let slide in the said slot the reduced squared end A of the hollow box A the slot being of such shape and size that the head may be adjusted horizontally at right angles to the main shaft B.

The hollow hub of the bearing 6 enters the hollow space within the end A of the hollow e is shaped to present a quadrilateral flange, as best representedin Fig. 7, and the said flange 0 is united by suitable screws 0 to the head A in the bottom of the said slot, the said screws passing outside the circular flanged part d of the rest d. The hollow box A just at the inner end of the squared part A thereof, is provided with two cross-grooves, in which enters two gibs p and 13 said gibs being connected to the innner end of said head by suitable screws 19 The part A of the hollow box has fixed. to it a screw p and said screw receives upon it an adj ustin g-nut 9, having an annular groove g, which is entered by a portion of the yoke D, and by rotating said nut when the said yoke stands in the said groove, the said nut acting on the screw 19 and turning in the hole 19 of the head, the said head, together with the bearing 6, the rest d and the feather-edger 01 is adjusted with relation to the shaft B to compensate for the wear of the cutter due to grinding.

Having fully described my invention and without limiting myself as to details, what I claim, and desire to secure by Letters Patent, 1s-- 1. For heeLtrimming, a rotary cutter and rand-guide, having cooperating with them an independent rotary rest disconnected from said rand-guide and presentinga series of projections occupying the spaces between the blades of the cutter, to form a rest for the edge of the sole, the rand-guide and rest being movable one toward and from the other to adapt the cutter to trim heels of different heights, substantially as described.

2. A rotary cutter, a rand-guide, and a rotating rest, substantially as described, for the edge of the sole, combined with a featherbox A and the flanged end 0 of said bearing edger device located at one side of said rest to contact with the outer face of the sole near its edge as the heel is being trimmed, substantially as set forth.

. 3. Arotary cutter, a slotted sleeve to which it is attached, a rotary resthavinga series of projections entering the spaces between the blades of the cutter, a bearing for the hub of the said rest, and means to connect the said hub and shaft through the said sleeve to thus IIO drive the said rest in unison with the cutter,

substantially as described.

4. A slotted sleeve provided with a rotary cutter, a rand-guide, and a rotating rest having projections entering the spaces between the blades of the said cutter, combined with an auxiliary guide presenting a guidingedge to cooperate with said rest in controlling the presenting of the heel to the cutter, substantially as described.

5. A rotary cutter and attached randguide, and a rotating rest having projections entering the spaces between the blades of the said cutter, combined with two auxiliary guides,

one at each side of the said rotary cutter, and

presenting guiding edges in line with said rotating rest, to operate, substantially as described.

6. In a heel-trimming machine, a rotating sleeve and a rotary cutter, and a rand-guide attached thereto, a rotating feather-edger, and a rest, presenting arms inserted between the blades of the cutter, a rotating shaft as B, and connections between it and said sleeve, to enable the said sleeve with its attached cutter and the rand-guide to slide to and from the feather-edger and rest according to variation in thickness of heel, combined with a stationary sole-support occupying a position at one side of said cutter in a plane at an angle to the vertical plane in which the cutter rotates, and means to adjust and then fix the said support in its adjusted position, whereby said support may be inclined more or less according to the inclination desired for the edge of the heel, substantially as described.

7. A rotary cutter, its rand-guide, a sleeve carrying said cutter and said guide, a rotating rest having projections to enter the spaces between the blades of said cutter, combined with a spring-held plate or finger acting on the said rand-guide and normally keeping it and the cutter in position to trim the heel of minimum height at its thinnest portion, letting the said rand-guide and cutter move, however, in unison to adapt themselves to the increasing thickness of the heel, substantially as described.

8. A rotary cutter, its rand-guide, a sleeve carrying said cutter and said guide, a rotating rest having projections to enter the spaces between the blades of said cutter,and a springheld plate or finger acting on the said randguide and normally keeping it and the cutter in position to trim a heel of minimum height at its thinnest portion, letting the said randguide and cutter move, however, in unison to adapt themselves to the increasing thickness of the heel, combined with an adjusting device cooperating with said finger to adapt it to changes in width of cutter used, substantially as described.

9. In a heel-trimming machine, a head, a bearing 6 connected therewith, a rotating rest mounted in said bearing, a rotating sleeve extended through said rest and having an attached cutter, the projectionsof the said rest entering the spaces between the blades of the said cutter, and a hollow box A combined with an adjusting device composed of a screw attached to one end of said hollow box, and a nut held loosely in ayoke carried by said head and fitting the threads of said screw, the rotation of said nut adjusting the said head, the bearing and the rest, to preserve the proper relation between the said cutter and rest notwithstanding the decrease in the diameter of the cutter due to grinding, substantially as described.

10. For heel-trimming, a rotary cutter and rand-guide having cooperating with them a rotating rest presenting a series of projections occupying only the rear parts of the spaces between the blades of the cutter, the rand-guide and cutter being movable together laterally with relation to the said rest to uncover more or less of the cutting edges of the cutter and thus adapt it to trim heels of different heights, substantially as described.

11. In a heel-trimming machine, a rotating shaft; and a rotating cutter and rand-guide movable longitudinally together with relation to said shaft to thereby enable the cutter to trim heels of different thickness; combined with a sole-support held stationary during the operation of trimming a heel, it occupying at such time a position at one side of said cutter and in a plane at an angle to the ver- 1 tical plane in which the cutter rotates, substantially as described.

12. In a heel-trimming machine, a rotatable sleeve, a rotary cutter attached to it and a cooperating rand-guide, combined with a sole-support made as a flat table, and auxiliary guides located near one edge of said table and partially embracing the said cutter, the face of said support occupying a position at one side of said cutter in a plane at an angle to the vertical plane in which the cutter rotates, and means to hold said support stationary throughout the operation of trimming a heel, substantially as described.

13. In aheel-trimmin g machine, the following instrumentalities, viz: a rotating shaft; and a rotating cutter and rand-guide movable together longitudinally with relation to said shaft to thereby adapt them to trim heels of difierent thickness; combined with a solesupport held stationary in a position at one side of said cutter and in a plane at an angle to the vertical plane in which the cutter rotates during the operation of trimming a heel; and a rotary rest d it also occupying a defined position with relation to the said stationary sole-support during said heel-trimming operation, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

BENJAMIN F. MAYO.

Witnesses:

GEO. W. GREGORY, LAURA MANIX. 

